DrPhillips Is a Cognitive-Developmental Psychologist Who Studies How Children Learn

question 24

Essay

Dr.Phillips is a cognitive-developmental psychologist who studies how children learn mathematical principles.His current interest is in studying how children learn multiplication.He recruits 54 second-graders who have not yet learned how to multiply numbers to participate in his study.He is curious as to whether different teaching styles lead to better mastery of the subject.One condition (A)involves having students read a chapter on multiplication from their textbook.One condition (B)involves having students watch a video of cartoon characters explaining multiplication.One condition (C)involves having students being taught multiplication from a teacher.One condition (D)involves having students being taught multiplication by a fourth-grader.In all conditions,participants spend 30 minutes learning the fundamentals of multiplication and are then given the same 15-question multiplication test.The number of questions answered correctly is recorded.The data are below.


-Using Dr.Phillips' study as an example,explain the difference between a control group and a comparison group.Why did Dr.Phillips' study not have a control group?

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Definitions:

Stock Dividend

A dividend payment made in additional shares of a company's stock instead of cash.

Cash Dividend

A distribution of earnings made by a company to its stockholders, often in the form of profits.

Stock Split

A corporate action that increases the number of shares by dividing each share, which typically reduces the price per share.

Retained Earnings

The portion of a company's profits that are kept or retained and not paid out as dividends to shareholders, often used for reinvestment in the business.